Don't do it!
Those big fan leaves are THE energy factories that make your plant grow!
Removing them will DEFINITELY stunt your plants, reduce yield and increase the liklihood of hermaphroditism.
Just remember -
Maximum amount of healthy green leaves = maximum energy production = maximum and fastest growth.
It really is that simple and basic plant biology 101.
Besides, if your plant did not NEED those leaves, it would not have grown them in the first place!
Hope this helps, Organoman.